The TRUMPF R050-00 Focusing Tube D.1.25mm/0.0492'' ROCTEC 100 is a brand-new, genuine focusing tube designed for high-precision applications. With a diameter of 1.25 mm (0.0492''), this tube is made from durable ROCTEC 100 material, ensuring optimal performance and longevity. It measures 8 cm in length, 1 cm in width, and 0.3 cm in height, making it an essential component for laser systems.